They are hard as a cement brick without a doubt. However I call operator error on the person that posted the video! I put 80-100 in a 4x8 flood tray with the drain plugged and put them all in the nutrients of my choice! You have to add water/feed 3-4 times to get them correct this way. I’m guessing at least 1/2 gallon each.Saw recently a video, one customer received floraflex bags where the coco was so compressed he had to manually break each and every single one up, plants would not take.
However they come pre buffered and guaranteed pest free. ( I will throw them under the bus if I ever see a fungus gnat)
I’m definitely can’t say I recommend then yet however I am happy so far!
I also plan to look into Canna’s version and plan to run them side by side if possible!
Picture is 5 one gallon bags I expanded today in order to get my plant count to the number I wanted before FLIP in a week or so!
Peace